diff --git a/JapaneseFilter/sections/specific.txt b/JapaneseFilter/sections/specific.txt
index 1abc40618df..8d2c1154e32 100644
--- a/JapaneseFilter/sections/specific.txt
+++ b/JapaneseFilter/sections/specific.txt
@@ -3910,7 +3910,10 @@ livedoor.jp##a[href^="http://track.xmax.jp/"]
 !
 ! https://github.com/AdguardTeam/AdguardFilters/issues/116832
 ! Duck DNS phishing domains
+!+ NOT_PLATFORM(ios, ext_android_cb, ext_safari)
 /^http:\/\/[a-z]{10}\.duckdns/$document,domain=duckdns.org
+!+ PLATFORM(ios, ext_android_cb, ext_safari)
+/^http:\/\/[a-z][a-z][a-z][a-z][a-z][a-z][a-z][a-z][a-z][a-z]\.duckdns/$document,domain=duckdns.org
 !
 ! video.fc2.com - sync shanxivideo.net in Chinese filters
 ||market.laxd.com/embed/rb/sevices?$domain=video.laxd.com